diff options
Diffstat (limited to 'gcc/config/mcore/mcore.c')
| -rw-r--r-- | gcc/config/mcore/mcore.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/config/mcore/mcore.c b/gcc/config/mcore/mcore.c index 97fbb8c8768..69fa798b666 100644 --- a/gcc/config/mcore/mcore.c +++ b/gcc/config/mcore/mcore.c @@ -144,6 +144,7 @@ static void mcore_option_override (void); static bool mcore_legitimate_constant_p (machine_mode, rtx); static bool mcore_legitimate_address_p (machine_mode, rtx, bool, addr_space_t); +static bool mcore_hard_regno_mode_ok (unsigned int, machine_mode); /* MCore specific attributes. */ @@ -240,6 +241,9 @@ static const struct attribute_spec mcore_attribute_table[] = #undef TARGET_WARN_FUNC_RETURN #define TARGET_WARN_FUNC_RETURN mcore_warn_func_return +#undef TARGET_HARD_REGNO_MODE_OK +#define TARGET_HARD_REGNO_MODE_OK mcore_hard_regno_mode_ok + struct gcc_target targetm = TARGET_INITIALIZER; /* Adjust the stack and return the number of bytes taken to do it. */ @@ -3260,3 +3264,14 @@ mcore_legitimate_address_p (machine_mode mode, rtx x, bool strict_p, return false; } +/* Implement TARGET_HARD_REGNO_MODE_OK. We may keep double values in + even registers. */ + +static bool +mcore_hard_regno_mode_ok (unsigned int regno, machine_mode mode) +{ + if (TARGET_8ALIGN && GET_MODE_SIZE (mode) > UNITS_PER_WORD) + return (regno & 1) == 0; + + return regno < 18; +} |